如何查看针对Oracle执行的查询？

import java.sql.*;

public class OracleQueryViewer {
    public static void main(String[] args) {
        String url = "jdbc:oracle:thin:@//hostname:port/serviceName";
        String user = "username";
        String password = "password";
        
        try {
            Connection connection = DriverManager.getConnection(url, user, password);
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery("SELECT * FROM my_table");
            
            while (resultSet.next()) {
                String column1 = resultSet.getString("column1");
                int column2 = resultSet.getInt("column2");
                System.out.println("column1: " + column1 + ", column2: " + column2);
            }
            
            resultSet.close();
            statement.close();
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

SQL> show user;

SQL> select * from all_users;

SQL> show processlist;

SQL> select * from v$session;

SQL> show event_name;

SQL> select event_name, user_name, wait_time from v$event_name;